Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...
Dark theme for Firefox. Inspired by the night launch of STS-116.
A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.
We’re sorry to say we can’t maintain Skipscreen anymore. We’d love to see someone carry on with it. If you’d like to buy Skipscreen, or otherwise find it a good home, please contact us at firstname.lastname@example.org.
This extension provides advanced configuration for your browser and many additional options, that are not displayed in the Firefox "Options..." dialog.
Permanently hide content from web pages using the Context Menu. Simply, click and "Remove it Permanently". Now includes previewing of items before removal, support for IFrame as well as lots of advanced features to make it easy for...
Cookie Editor that allows you add and edit session and saved cookies
Cool utility for cleaning up a page (for printing or better viewing) as well as for web development. Displays a red rectangle on the element under the mouse -- hit "w" to go wider (get the containing element), then hit other keystrokes to remove, etc
ANTHEM is a take on originality and recent UI trends for Firefox web browsing. It was built on the original Mac theme that comes OOB with the FF3 install.
Many times we need to just restore the original set of tabs/URLs we were browsing in the previous session. Or may be want to undo the closing of 1 or more tabs in the current session...
Collections are groups of related add-ons that anyone can create and share.Explore Collections